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Periodic signal measurement device, periodical signal measurement method, and sampling period determination method

A technology of sampling period and periodic signal, applied in the field of periodic signal measurement device, can solve the problems of high cost and increased processing load of the measurement device, and achieve the effects of suppressing measurement error, suppressing the increase in processing load and cost

Active Publication Date: 2020-09-18
YAMATAKE HONEYWELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the sampling cycle is shortened, the processing load on the measurement device will increase, so there is a problem that it is necessary to prepare a high-performance and high-cost measurement device.

Method used

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  • Periodic signal measurement device, periodical signal measurement method, and sampling period determination method
  • Periodic signal measurement device, periodical signal measurement method, and sampling period determination method
  • Periodic signal measurement device, periodical signal measurement method, and sampling period determination method

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no. 1 Embodiment

[0065] Next, a first embodiment of the present invention will be described with reference to the drawings. Figure 7It is a block diagram showing the configuration of the periodic signal measuring device according to the first embodiment of the present invention. The periodic signal measurement device includes: a measurement unit 1 that performs A / D sampling on the periodic signal S, and performs predetermined processing on the sampled value to obtain a measurement value M; The value M is processed; the sampling period determination unit 3 determines the sampling period of the measurement unit 1 ; and the sampling period control unit 4 sets the sampling period of the measurement unit 1 according to the determination of the sampling period determination unit 3 .

[0066] The measuring unit 1 is composed of a rectifying unit 10, an A / D converting unit 11, and a data processing unit 12. The rectifying unit 10 rectifies the periodic signal S, and the A / D converting unit 11 perform...

no. 2 Embodiment

[0102] The data processing unit 12, the current value conversion unit 13, the data processing unit 2, the sampling period determination unit 3, and the sampling period control unit 4 of the measurement unit 1 or 1a described in the first embodiment can be equipped with a CPU (Central Processing Unit) , a computer with a storage device and an interface, and a program that controls these hardware resources. The configuration example of this computer is shown in Figure 13 .

[0103] The computer includes a CPU 60 , a storage device 61 , and an interface device (hereinafter, abbreviated as I / F) 62 . A measurement object that outputs a periodic signal S, a function generator 5 that outputs a test periodic signal S, and the like are connected to the I / F 62 . In such a computer, the programs for realizing the periodic signal measurement method and the sampling period determination method of the present invention are provided in the state recorded in recording media such as floppy ...

no. 3 Embodiment

[0105] In the first and second embodiments, the sampling period is determined by using the measurement unit 1 or 1a and the data processing unit 2 of the actual periodic signal measurement device, but it is also possible to perform a simulation on a computer. In this case, the function of the periodic signal measuring device and the function of the function generator 5 are realized by software using a computer as described in the second embodiment and executed Figure 12 The processing described in can be done.

[0106] That is, using software to build imitation Figure 7 , Figure 8 The model obtained from the functions of the measurement unit 1 and the data processing unit 2 described in , may be used to obtain an estimated value of the measured value M corresponding to the test period signal S and an estimated value of the data processed value DP. Alternatively, use software to build mimic Figure 7 , Figure 9 , Figure 10 The model obtained from the functions of the ...

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Abstract

The present invention relates to a period signal measurement device, a period signal measurement method and a sampling period determination method. On the one hand, the increase in processing load and cost is suppressed, and on the other hand, the measurement error of the periodic signal is suppressed. The periodic signal measurement device of the present invention includes: a measurement unit (1) that samples the periodic signal (S) and performs predetermined processing on the sampled value to obtain a measured value (M); a sampling period determination unit (3), It determines the sampling period of the measurement unit (1) so that the vibration amount of the measured value (M) within a certain measurement period is within the allowable range; and the sampling period control unit (4) is based on the The determination to set the sampling cycle of the measurement unit (1).

Description

technical field [0001] The present invention relates to a periodic signal measurement device and method for measuring periodic signals such as alternating current signals, and more particularly to a technique for determining a sampling period in which measured values ​​of periodic signals are stable. Background technique [0002] Conventionally, there is a measurement method for obtaining a measurement value by A / D sampling a periodic signal and performing predetermined processing on the sampled value. For example, Patent Document 1 discloses the following measurement method: sampling the AC current signal, multiplying the sampled values ​​of the AC current signal within the sampling period by itself, and adding them together to obtain the effective value of the current. [0003] In the method of measuring a periodic signal as described above, when the rise or fall of the periodic signal to be measured changes instantaneously, if the period of the A / D sampling to be measured...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G01R19/25
CPCG01R19/0007G01R19/2509G01R23/02
Inventor 本桥勇人八木智广乘安博史
Owner YAMATAKE HONEYWELL CO LTD
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